net/bnxt: fix MAC/VLAN filter allocation

We were adding the VLAN filters to all the VNICs of the function.
Also, we were adding these VLANs to all the existing MAC only filters.
This was resulting in fewer VLANs getting added. By default we should
allocate MAC+VLAN filter only to the default VNIC of the function using
the default mac address.
Similar logic was followed in the VLAN deletion code. This patch fixes
it.  Use inner VLAN fields instead of outer VLAN during filter deletion
to be in sync with VLAN addition code.

Fixes: 246c5cc5f05e ("net/bnxt: use correct flags during VLAN configuration")
Cc: stable@dpdk.org
Signed-off-by: Santoshkumar Karanappa Rastapur <santosh.rastapur@broadcom.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>